Named, portable profiles for the Image Pool: a Pool Profile companion node
(create/select/rename/delete/duplicate/export-import) outputs a POOL_PROFILE
id into the pool's new optional input; profile or pool_id wins. Registry
(name->id) in profiles.json; live edit-time grid switch via cross-node
propagation. TDD plan with a pure stdlib profiles layer incl. zip round-trip.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
